- Improved Federation Support
  - New command: `kubefed`
  - DaemonSets
  - Deployments
  - ConfigMaps
- Simplified Cluster Deployment
  - Improvements to `kubeadm`
  - HA Setup for Master
- Node Robustness and Extensibility
  - Windows Server Container support
  - CRI for pluggable container runtimes
  - `kubelet` API supports authentication and authorization

## Features

* Turned-off etcd listening on public ports as potentially insecure. Removed ([#35192](https://github.com/kubernetes/kubernetes/pull/35192), [@jszczepkowski](https://github.com/jszczepkowski))
    * experimental support for master replication.
* Add support for vSphere Cloud Provider when deploying via kubeup on vSphere. ([#31467](https://github.com/kubernetes/kubernetes/pull/31467), [@kerneltime](https://github.com/kerneltime))

        // if the iterators don't support remove
        return Sets.removeAllImpl(this, c.iterator());
      }
    }

    @Override
    public boolean retainAll(Collection<?> c) {
      try {
        return super.retainAll(checkNotNull(c));
      } catch (UnsupportedOperationException e) {
        // if the iterators don't support remove

        // if the iterators don't support remove
        return Sets.removeAllImpl(this, c.iterator());
      }
    }

    @Override
    public boolean retainAll(Collection<?> c) {
      try {
        return super.retainAll(checkNotNull(c));
      } catch (UnsupportedOperationException e) {
        // if the iterators don't support remove

- Added kubelet support for systemd watchdog integration. With this enabled, systemd can automatically recover a hung kubelet. ([#127566](https://github.com/kubernetes/kubernetes/pull/127566), [@zhifei92](https://github.com/zhifei92)) [SIG Cloud Provider, Node and Testing]

style

// sucks : 2014-12-22 Vox Populi Registry Ltd.
sucks

// supplies : 2013-12-19 Binky Moon, LLC
supplies

// supply : 2013-12-19 Binky Moon, LLC
supply

// support : 2013-10-24 Binky Moon, LLC
support

// surf : 2014-01-09 Registry Services, LLC
surf

// surgery : 2014-03-20 Binky Moon, LLC
surgery

// suzuki : 2014-02-20 SUZUKI MOTOR CORPORATION
suzuki

          ReferenceEntry<K, V> next = previous.getNextInAccessQueue();
          return (next == head) ? null : next;
        }
      };
    }
  }

  // Cache support

  public void cleanUp() {
    for (Segment<?, ?> segment : segments) {
      segment.cleanUp();
    }
  }

  // ConcurrentMap methods

  @Override
  public boolean isEmpty() {

    testRequestMethod("GET", true)
  }

  @Test
  fun requestMethodHeadIsNotCached() {
    // We could support this but choose not to for implementation simplicity
    testRequestMethod("HEAD", false)
  }

  @Test
  fun requestMethodPostIsNotCached() {
    // We could support this but choose not to for implementation simplicity
    testRequestMethod("POST", false)
  }

  @Test

     * your current SDK version but also at the oldest version you support. For example, <a
     * href="https://developer.android.com/sdk/api_diff/16/">API Level 16</a> is the first version
     * in which {@code Cursor} is {@code Closeable}. To support older versions, pass a wrapper
     * {@code Closeable} with a method reference like {@code cursor::close}.
     *

 * URLs that represent workgroups, servers, shares, or directories require a trailing slash '/'.
 * </td></tr>
 *
 * <tr><td width="20%">
 * <code>smb1://MYGROUP/?SERVER=192.168.10.15</code></td><td>
 * SMB URLs support some query string parameters. In this example
 * the <code>SERVER</code> parameter is used to override the
 * server name service lookup to contact the server 192.168.10.15
 * (presumably known to be a master